MESON Chess Problem Database

Problem Display
PID: 9322 (8/3K2k1/5NP1/8/4P3/8/3B4/Q7 w - - 0 1)

Clark, DW

Shakhmatny Listok, 1879

8/3K2k1/5NP1/8/4P3/8/3B4/Q7

#2

6 + 1

3813 300 Sachmatu Uzdaviniu 1991
3713 Snap 2001

SOLUTION

  • SOUND
  • Sets
    • 1...Kf8
      • 2.Bh6#
  • Tries
    • 1.Ke6?
      • 1...Kxg6
        • 2.Qg1#
      • 1...Kf8
        • 2.Bh6#
      • 1...Kh8!
    • 1.Ke7?
      • 1...Kxg6
        • 2.Qg1#
      • 1...Kh8!
    • 1.Sh5+?
      • 1...Kf8
        • 2.Qg7#
        • 2.Qh8#
        • 2.Qa8#
      • 1...Kg8
        • 2.Qg7#
        • 2.Qa8#
      • 1...Kxg6!
    • 1.Se8+?
      • 1...Kf8
        • 2.Qg7#
        • 2.Qh8#
      • 1...Kg8
        • 2.Qg7#
      • 1...Kxg6!
  • Keys
    • 1.Qg1!
      • 1...Kxf6
        • 2.Bc3#
      • 1...Kf8
        • 2.Bh6#
      • 1...Kh8
        • 2.g7#

This anticipates 4870(1892)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::B(B)
  • Tries
    • Try
      • K(F);S_FLIGHT
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR(A)
        • K(a);S_FLIGHT::B(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(F);P-FLIGHT
      • Vars
        • K(a);OGATEB,P-FLIGHT,XP(E)::QAR(A)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(D);CHECK
      • Refutation
        • K(a);P-FLIGHT,XP(E)
    • Try
      • S(D);CHECK
      • Vars
        • K(a);P-FLIGHT::QAR1(A)
      • Refutation
        • K(a);P-FLIGHT,XP(E)
  • Actual
    • Q(A);
    • Vars
      • K(a);OGATEB,S_FLIGHT,XS(D)::B(B)
      • K(a);S_FLIGHT::B(B)
      • K(a);OGATE,S_FLIGHT::P(E)
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